I'm Nick Rice the creator of Begriddled puzzles. My first book, Begriddled! A New Kind of Puzzle is available on Amazon. My second, Begriddled! Logic will be joining it soon.
I've a mailing list on my website at begriddled.com/free. Join it to get sent a print-at-home ebook containing a selection of six puzzles from each (ie 12 in total).
A puzzle consists of a grid of characters (eg numbers) and a circular sequence of ten characters, though for the logic puzzles you have to work out that sequence for yourself from "logic rules."
Begriddled rules are simple.
Rule 0: Dots are dots. You simply pencil them in.
Rule 1: Except for dots, join all pairs of horizontally and vertically adjacent characters that are the same.
Rule 2: Join all pairs of horizontally, vertically, and diagonally adjacent characters that appear next to each other in the circular sequence.
Of course with the logic puzzles you can't implement Rule 2 without having worked out what lies what to next in the sequence.